Submission #1220884

#	Time	Username	Problem	Language	Result	Execution time	Memory
1220884		Trumling	Amusement Park (CEOI19_amusementpark)	C++20	19 / 100	9 ms	1352 KiB

amusementpark

//Trumling ©
//Αφόδευε υψηλά και ηγνάντει 
#include <bits/stdc++.h>
using namespace std; 

typedef long long ll;
#define pb push_back
#define F first
#define S second
#define enter cout<<'\n';
#define INF 99999999999999999
#define MOD 998244353
#define all(x) x.begin(),x.end()

int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);

ll n,m;
cin>>n>>m;

pair<ll,ll> arr[m];
for(int i=0;i<m;i++)
        cin>>arr[i].F>>arr[i].S;
    
assert(m<=25);
ll ans=0;
vector<ll>v;
for(int i=1;i<=n;i++)
    v.pb(i);

set<ll>s;
do
{
    ll curr=0;
    ll id=0;
    for(int i=0;i<m;i++)
        if(v[arr[i].F-1] < v[arr[i].S-1])
            {
                curr++;
                curr%=MOD;
                id+=(1<<i);
            }

    if(s.find(id)==s.end())
    {
       s.insert(id);
       ans+=curr;
       ans%=MOD;
    }

} while (next_permutation(all(v)));

cout<<ans;
}

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 0 / 23
• Subtask 4: 0 / 21
• Subtask 5: 0 / 37